1-{8 1{40 -carboxylic acylamino-2{40 ,2{40 ,2{40 -trichloro)-ethyl{9 -2-(hydrocarbyloxycarbonyl-amino)-benzimidazoles

ABSTRACT

WHEREIN R1 and R2 are each hydrogen, chlorine, bromine, ALKYL OF ONE TO FOUR CARBON ATOMS OR ALKOXY OF ONE TO FOUR CARBON ATOMS, R3 is alkyl of one to three carbon atoms or allyl, and R4 is hydrogen, alkyl of one to 17 carbon atoms which may have from one to three halogen substituents or one 2,4dichlorophenoxy substituent attached thereto, phenyl, alkenyl of two to 17 carbon atoms and 1 to 3 double bonds, or alkoxy of one to 12 carbon atoms; THE COMPOUNDS ARE USEFUL AS PROPHYLACTIC AS WELL AS CURATIVE BIOCIDAL AGENTS, ESPECIALLY AS FUNGICIDAL AGENTS AGAINST ALL TYPES OF Levow; Tobias E. fungi, such as mildew, plant rust, Fusaria and the like. Compounds of the formula

[22] Filed:

United States Patent 0st et al.

[54] l-[ l '-CARBOXYLIC ACYLAMINO- 2',2',2-TRlCHLORO)-ETHYL]-2- (HYDROCARBYLOXYCARBONYL- AMINO)-BENZIMIDAZOLES [72] Inventors: Walter 0st; Klaus Thomas; Dietrich Jerchel, all of Ingelheim am Rhine, Germany [73] Assignee: C. H. Boehringer Sohn, lngelheim am Rhine, Germany July 17, 1970 [21] Appl. No.: 55,989

[52] U.S. CI ..260/309.2, 260/404, 260/456 A, 260/469, 260/481 C, 260/482 C, 260/487,

260/558 R, 260/559 B, 260/561 R, 260/561 N, 260/561 I-IL, 260/562 R, 260/562 B,

FOREIGN PATENTS OR APPLICATIONS 1,114,069 5/1968 GreatBritain ..260/309.2 1,523,597 3/1968 France ..260/309.2

[ 51 Sept. 26, 1972 OTHER PUBLICATIONS Lecolier et al. Chem. Abst. Vol. 67, No. 735550 (1967). QD1.A51

Primary Examiner-Natalie Trousof Attorney-Hammond & Littell [57] ABSTRACT Compounds of the formula o R c. m tom N o wherein R and R are each hydrogen, chlorine, bromine, alkyl of one to four carbon atoms or alkoxy of one to four carbon atoms, R; is alkyl of one to three carbon atoms or allyl, and R is hydrogen, alkyl of one to 17 carbon atoms which may have from one to three halogen substituents or one 2,4-dichlorophenoxy substituent attached thereto, phenyl, alkenyl of two to 17 carbon atoms and l to 3 double bonds, or alkoxy of one to 12 carbon atoms; the compounds are useful as prophylactic as well as curative biocidal agents, especially as fungicidal agents against all types of Levow; Tobias E. fungi, such as mildew, plant rust, Fusaria and the like.

33 Claims, No Drawings L R2 C-NH- 0 R3 wherein R and R are each hydrogen, chlorine, bromine, alkyl of one to four carbon atoms or alkoxy of one to four carbon atoms, R is alkyl of one to three carbon atoms or allyl, and R is hydrogen, alkyl of l to 17 carbon atoms which may have from one to three halogen substituents or one 2,4-dichlorophenoxy substituent attached thereto, phenyl, alkenyl of two to 17 carbon atoms and one to three double bonds, or alkoxy of one to 12 carbon atoms. The compounds embraced by formula I above may be prepared by various methods involving well known chemical principles, such as by reacting a benzimidazole derivative of the formula 0 R2 CNHgORa wherein R R and R have the same meanings as in formula I, with an amide of the formula s Cl@C( )HNH-(")B4 (III) wherein R, has the same meanings as in formula I and R is a substituent which can be easily split off as an anion, such as chlorine, bromine, alkylsulfonyl, azido, benzoyloxy, trifluoroacetoxy, arylsulfonyloxy or alkyl- I sulfonyloxy.

The reaction is carried out in the presence of an inert organic solvent medium, such as acetone, dioxane, tetrahydrofuran, dimethylformamide, dimethylsulfoxide methylenechloride, chloroform or mixtures of two or more of these, at a temperature between about 0 and 80C, preferably at room temperature. In many cases it is necessary to perform the reaction in a non homogeneous medium because some of the starting compounds of the formula II are only sparsely soluble in the organic solvent media referred to above. The reaction is advantageously carried out in the presence of an acid acceptor, preferably a tertiary aliphatic amine, such as triethylamine.

Most of the end products obtained by the process described above are solid crystalline substances which tend to form solvates with solvents used in the course of their preparation or purification; some of the compounds of the formula I are amorphous substances. The majority of the crystalline compounds melt or decompose within the temperature range of 140-180C, while the amorphous products have a melting point within the range of 60l 20C.

The starting compounds of the formulas [I and III are known compounds or may be prepared by methods described in the literature.

The following examples further illustrate the present invention and will enable others skilled in the art to understand it more completely. It should be understood, however, that the invention is not limited solely to the particular examples given below.

EXAMPLE 1 Preparation of l-[( 1-formylamino-2',2,2-trichloro)- ethyl]-2-(methoxycarbonyl-amino)-benzimidazole A solution of 6.33 gm of N-(l,2,2,2-tetrachloroethyl)-formamide in 20 ml of tetrahydrofuran was admixed with a suspension of 5.73 gm of powdered 2- (methoxycarbonyl-amino)-benzimidazole in 50 ml of dry pyridine, and then 3.2 gm of triethylamine were added dropwise to the mixture. Thereafter, the reaction mixture was stirred for 14 hours at room temperature and subsequently vacuum-filtered to remove undissolved matter. The filtrate was diluted with 450 ml of n-hexane, whereby a crystalline precipitate separated out which was collected by vacuum filtration, washed with methanol and dried at 60C. 5.9 gm of l-( l-formylamino-2',2,2' trichloro)-ethyl]-2- (methoxycarbonyl-amino)-benzimidazole, decomp. pt. l73l75C, of the formula Calculated: C 39.4%; H 3.0%; Cl 29.1%; N 15.3%

Found: C 39.6%; H 3.1%; Cl 29.0%; N 15.3%

EXAMPLE 2 Preparation of 1-[(l'-chloroacetylamino-2',2,2-

trichloro)-ethyl]-2-(methoxycarbonyl-amino)- benzimidazole 4 gm of triethylamine were added dropwise to a mixture consisting of 5.73 gm of 2-(methoxycarbonylamino)benzimidazole, 7.8 gm of N-(l,2,2,2- tetrachloro-ethyl)-chloroactamide and 100 ml of dry tetrahydrofuran. The resulting suspension was stirred for for hours at room temperature and then filtered, the filtrate was evaporated in vacuo, and the solid residue was recrystallized from isopropanol. 7.5 gm of l-[( l -chloracetylamino-2',2,2'-trichloro)-ethyl]-2- (methoxycarbonyl-amino)-benzimidazole, decomp. pt. 178l C, of the formula were obtained.

EXAMPLE 3 Using a procedure analogous to that described in Example 2, 1-[( 1-acryloylamino-2',2',2'-trich1oro)- ethyl]-2-(methoxycarbonyl-amino)-benzimidazole, decomp. pt. 167169C., of the formula was prepared from 2-(methoxycarbonyl-amino)- benzimidazole and N-(l,2,2,2-tetrach1oro-ethyl)- acrylamide.

EXAMPLE4 Using a procedure analogous to that described in Example 2, 1-[(1-actylamino-2',2,2'-trichloro)-ethyl]- 2-(methoxycarbonyl-amino)-benzimidazole, decomp. pt. 170C., of the formula was prepared from 2-(methoxycarbonyl-amino)- benzimidazole and N-( l,2,2,2-tetrach1oroethyl)-acetamide. Upon recrystallization of the product from ethanol, it was obtained as the solvate with 1 mol of ethanol of crystallization.

EXAMPLE 40 Using a procedure analogous to that described in Example 2, 1[( l '-formylamino-2,2',2'-trichloro)-ethy1]- 2-( methoxycarbonyl-amino)-4(7)-methyl benzimidazole, decomp. pt. 170C., was prepared from 2-(methoxycarbonyl-amino)-4-methyl-benzimidazole and N-( 1,2,2,2,-tetrachloro-ethyl)-formamide.

EXAMPLE 4b Using a procedure analogous to that described in Example 2, 1-[( l'-acetylamino-2',2',2'-trich1oro)-ethyl1- 2-(methoxycarbonyl-amino)-4(7)-methylbenzimidazole, decomp. pt. 171-172C., was prepared from 2-( methoxycarbonyl-amino )-4-methylbenzimidazole and N-(l,2,2,2-tetrachloro-ethy1)- acetamide.

EXAMPLE4c Using a procedure analogous to that described in Example 2, l-[(1' acetylamino-2',2',2-trichloro)-ethyl1- 2-(isopropoxycarbonyl-amino)-5(6)-methylbenzimidazole, mp. 110C., was prepared from 2- (isopropoxycarbonylamino)-S-methyl-benzimidazole and N-( l ,2,2,2-tetrachloro-ethyl)-acetamide.

EXAMPLE 4d Using a procedure analogous to that described in Example 2, l-[(1'-fonnylamino-2',2,2-trich1oro)-ethyl]- 2(methoxycarbonylamino)-5(6)-ethy1-benzimidazole, m.p. 90C., was prepared from 2-(methoxycarbonylamino)-5-ethyl-benzimidazole and N-( 1,2,2,2- tetrachloro-ethyl )-formamide.

EXAMPLE 4e Using a procedure analogous to that described in Example 2, 1-[(1'-acetylamino-2,2',2trichloro)-ethyl]- 2-(methoxycarbonyl-amino)-5(6)-ethylbenzimidazole, m.p. C., was prepared from 2- (methoxycarbonyl-amino)-5-ethyl-benzimidazo1e and N-( 1,2,2,2-tetrachloro-ethy1)-aceta.mide.

EXAMPLE 4f EXAMPLE 4g Using a procedure analogous to that described in Example 2, 1-[(1'acetylamino-2',2',2'-trichloro-ethy1]-2- (methoxycarbonyl-amino)-5(6)-methoxybenzimidazole, amorphous, m.p. 72C., was prepared from 2-(methoxycarbonyl-amino)-5-methoxybenzimidazole and N-(1,2,2,2-tetrachloro-ethyl)- acetamide.

EXAMPLE 4h Using a procedure analogous to that described in Example 2, 1-[( l'-acetylamino-2,2',2'-trichloro-ethyl]- 2-(methoxycarbonyl-amino)-5(6)-n-buty1- benzimidazole, amorphous, m.p. C., was prepared from 2-(methoxycarbonyl-amino)-5-n-butylbenzimidazole and N-(1,2,2,2-tetrachloro-ethyl)- acetamide.

EXAMPLE 4i Using a procedure analogous to that described in Example 2, 1-[( l -formylamino-2',2,2'-trich1oro-ethyl]- 2-( methoxycarbonyl-amino )-5 6 )-n-butylbenzimidazole, amorphous, m.p. 80C., was prepared from 2-(methoxycarbo-nyl-amino )-5-n-buty1- benzimidazole and N-( l,2,2,2-tetra-chloroethyl)-formamide.

EXAMPLE 4k Using a procedure analogous to that described in Example 2, 1-[(1-formylamino-2-2',2-trichloro)-ethyl ]-2-(ethoxycarbonyl-amino)-5(6)-methylbenzimidazole, decomp. pt. C., was prepared from 2-(ethoxycarbonyl-amino)-5-methy1-benzimidazo1e and N-( 1 ,2,2,2-tetrachloroethyl )-formamide.

EXAMPLE 41 Using a procedure analogous to that described in Example 2, 1-[( l '-formylamino-2',2' ,2'-trichloro)-ethyl]- 2-(isopropoxycarbonyl-amino)-5(6)-methylbenzimidazole, decomp. pt. l62C., was prepared from 2- (isopropoxycarbo-nyl-amino )-5( 6 )-methylbenzimidazole and N-(l,2,2,2-tetra-chloroethyl)-formamide.

EXAMPLE 4m Using a procedure analogous to that described in Example 2, l-[(1'-acetylamino-2,2',2'-trichloro)-ethyl]- 2-(ethoxycarbonyl-amino)-5(6)-methylbenzimidazole, mp. 135C, was prepared from 2- (ethoxycarbonyl-amino)-5(6)-methyl-benzimidazole and N-( l,2,2,2-tetrachloro-ethyl)-acetamide.

EXAMPLE 5 Using a procedure analogous to that described in Example 2, the solvate of l-[(1-propionylamino-2,2',2- trichloro)-ethyl]-2-( methoxycarbonyl-amino)- benzimidazole with 0.5 mol of isopropanol of crystallization, decomp. pt. l72l 75C., of the formula \CNH-(LLO CH:

was prepared from 2-(methoxycarbonyl-amino)- benzimidazole and N-(l,2,2,2-tetrachloro-ethyl)- propionamide; the raw product was recrystallized from isopropanol.

EXAMPLE 6 Using a procedure analogous to that described in Example 2, l-[( l -acetylamino-2',2,2'-trichloro)-ethyl] 2-(methoxycarbonyl-amino)-5(6)-methylbenzimidazole, decomp. pt. 168170C., of the formuor 6-1130 N 0 U c NH-d-o 0113 N/ o EXAMPLE 7 Using a procedure analogous to that described in Example 2, l-[(l'-acryIoylamino-2',2,2'-trichloro)- ethyl]-2-(methoxycarbonyl-amino)-(5)6-methylbenzimidazole, an amorphous powder, m. p. l00-l 10 C., of the formula N/ 0 L l was prepared from 2-(methoxycarbonyl-amino)-6- methyl-benz-imidazole and N-( 1 ,2,2,2- tetrachloroethyl)acrylamide; the raw product was treated with isopropylether.

EXAMPLE 8 Using a procedure analogous to that described in Example 2, l-[(1-stearoylamino-2',2',2'-trichloro)- ethyl]-2-(methoxycarbonyl-amino)-benzimidazole, m. p. l05l07C., of the formula was prepared from 2-( methoxycarbonyl-amino)- benzimidazole and N-( l ,2,2,2-tetrachloroethyl)-stearic acid amide.

EXAMPLE 9 Using a procedure analogous to that described in Example 2, l-[( l '-octanoylamino-2',2,2'-trichloro)- ethyl]-2-( methoxycarbonyl-amino)-benzimidazole, decomp. pt. l55156C., of the formula was prepared from 2-(methoxy-carbonyl-amino)- benzimidazole and N-(l,2,2,2-tetrachloroethyl)-caprylic acid amide.

EXAMPLE [0 Using a procedure analogous to that described in Example 2, l-[( 1 '-formylamino-2',2',2'-trichloro)-ethyl]- 2-(allyloxycarbonyl-amino)-benzimidazole, decomp. pt. l57l 59C., of the formula N ll was prepared from 2-(allyloxycarbonyl-amino)- benzimidazole and N-( l ,2,2,2-tetrachloroethyl)-formamide. The raw product was an amorphous substance which was caused to crystallize by treatment with isopropanol.

EXAMPLE 1 1 Using a procedure analogous to that described in Example 2, l-[(l'-acryloylamino-2',2',2'-trichloro)- ethyl]-2-( allyloxycarbonyl-amino)-benzimidazole, decomp. pt. l42l44C., was prepared from 2-(allyloxycarbonyl-amino)-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-acrylamide. The amorphous raw product was caused to crystallize as in Example 10.

EXAMPLE 12 Using a procedure analogous to that described in Example 2, l-[( l'-acetylamino-2',2',2'-trichloro)-ethyl]- 2-(allyloxycarbonyl-amino)-benzimidaz0le, decomp. pt. l57l 59C., was prepared from 2-(allyloxycarbonyl-amino)-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-acetamide. The raw product was caused to crystallize as in Example 10.

EXAMPLE 13 EXAMPLE 14 Using a procedure analogous to that described in Example 2, l-[(1-benzoylamino-2,2,2'-trichloro)- ethyl]-2-(allyloxycarbonyl-amino)-benzimidazole, decomp. pt. l57-159C., of the formula l ll ClaC-CH-NH-C-CuHs was prepared from 2-( allyloxycarbonyl-amino) benzimidazole and N-( l ,2,2,2-tetrachloroethyl) benzamide in the presence of triethylamine. The raw product was recrystallized from isopropanol.

EXAMPLE 15 Using a procedure analogous to that described in Example 2, l-[(l-octanoylamino-2',2',2'-trichloro)- ethyl]-2-(allyloxycarbonyl-amino)-benzimidazole, decomp. pt. 14 ll 42C., was prepared from 2-(allyloxycarbonyl-amino)-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-octanoic acid amide.

EXAMPLE 16 Using a procedure analogous to that described in Example 2, 1-[( l -ethoxycarbonylamino-2',2',2- trichloro)-ethyl]-2-(allyloxycarbonyl-amino)- benzimidazole, of the formula N ii was prepared from 2-(allyloxycarbonyl-amino)- benzimidazole and N-( l,2,2,2-tetrachloroethyl urethane. The raw product was recrystallized from isopropanol, yielding the product as the solvate with 1 mol of isopropanol of crystallization. The solvate melted initially at 81C. and upon further heating solidified again and finally decomposed at 175C.

EXAMPLE 17 Using a procedure analogous to that described in Example 2, l-[( l '-formylamino-2',2',2'-trichloro)-ethyl]- 2-(methoxycarbonyl-amino)-5,6-dimethylbenzimidazole, decomp. pt. l73l 75C. isopropanol), of the formula (from was prepared from 2-(methoxycarbonyl-amino)-5,6- dimethyl-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-formamide.

EXAMPLE 18 Using a procedure analogous to that described in Example 2, l-[( l '-acetylamino-2',2,2'-trichloro)-ethyl]- 2-( methoxycarbonyl-amino)-5,6-dimethylbenzimidazole, decomp. pt. C, of the formula was prepared from 2-(methoxycarbonyl-amino)-5,6- dimethyl-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-acetamide. The raw product was recrystallized from isopropanol, yielding the product as the solvate with 0.5 mol of isopropanol of crystallizatron.

EXAMPLE 19 Using a procedure analogous to that described in Example 2, l-[( l -formylamino-2',2,2'-trichloro)-ethyl]- 2-( methoxycarbonyl-amino)-5 6 )-chlorobenzimidazole, decomp. pt. l46l48C., of the formula was prepared from 2-(methoxycarbonyl-amino)-5- chloro-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-formamide. The raw product was recrystallized from isopropanol, yielding the solvant with 0.5 mol of isopropanol of crystallization.

EXAMPLE 20 Using a procedure analogous to that described in Example 2, l-[('l '-acetylamino-2' ,2',2'-trichloro)-ethyl]- 2-( methoxycarbonyl-amino H 5 )6-chlorobenzimidazole, decomp. pt. l52l 54C., of the formula was prepared from 2-(methoxycarbonyl-amino)- benzimidazole and N-( l ,2,2,2-tetrachloroethyl)-acetamide. Recrystallization from isopropanol yielded the solvate with 1 mol of isopropanol of crystallization.

EXAMPLE 21 was prepared from 2-(methoxycarbonyl-amino)- benzimidazole and l\l-(1,2,2,2-tetrachloroethyl)-o,pdichlorophenoxy-acetamide.

EXAMPLE 22 Using a procedure analogous to that described in Example 2, l?[( l'-chloroacetylamino-2,2 ,2'-trichloro)- ethyl]-2-(methoxycarbonyl-amino)-5(6)-methylbenzimidazole, decomp. pt. l46l48C., of the formula ii C-NH-C-OCH:

was prepared from 2-(methoxycarbonyl-amino)-5- methyl-benzimidazole and N-( l,2,2,2- tetrachloroethyl)-chloroacetamide.

EXAMPLE 23 Using a procedure analogous to that described in Example 2, l-[( l'-pivaloylamino-2',2',2'-trichloro ethyl]-2-(methoxycarbonyl-amino)-(5)6-methylbenzimidazole, decomp. pt. l74-l 76C., of the formula was prepared from 2-(methoxycarbonyl-amino)-6- methyl-benzimidazole and N-( l,2,2,2- tetrachloroethyl )-pivalic acid amide.

EXAMPLE 24 Preparation of l-[( l '-pivaloylamino-2',2 ,2- trichloro)-ethyl]-2-(methoxycarbonyl-amino)- benzimidazole 3.8 gm of triethylamine were added dropwise to a mixture consisting of 5.73 gm of 2-(methoxycarbonylamino)-benzimidazole and 8 gm of N-(l,2,2,2 tetrachloro-ethyl)-trimethylacetamide and 100 ml of tetrahydrofuran. Thereafter, the reaction mixture was stirred at room temperature for 48 hours, the insoluble matter was separated by vacuum filtration, the filtrate was evaporated, and the residue was stirred with 50 ml of isopropanol. The light-gray crystalline substance formed thereby was collected by vacuum filtration and digested with 200 ml of acetone. The insoluble malt was filtered off, the filtrate was evaporated in vacuo, and the residue was recrystallized from isopropanol, yielding 5.8 gm of l-[(l'-pival0ylamino-2',2,2'- trichloro)-ethyl]-2-(methoxycarbonyl-amino)- benzimidazole, decomp. pt. ll 72C.

EXAMPLE 25 Preparation of l-[(l"methacryloylamino-2',2,2'- trichloro)-ethyl]-2-(methoxycarb0nyl-amino)- benzimidazole 4 gm of triethylamine were added dropwise to a mixture consisting of 5.73 gm of '2-(methoxycarbonylamino)-benzimidazole, 7.5 gm of N-(l,2,2,2- tetrachloro-ethyl)-methacrylamide and 50 ml of dimethylsulfoxide. Thereafter, the reaction mixture was stirred at room temperature for 16 hours, and then the insoluble matter, which consisted largely of triethylamine hydrochloride, was separated by vacuum filtration. The filtrate was admixed with 200 ml of water, and the crystalline precipitate formed thereby was collected by vacuum filtration, washed with water and recrystallized from isopropanol. 4.5 gm of l-[( l metha-cryloylamino-2',2,2'-trichloro)-ethyl]-2- (methoxycarbonylamino)-benzimidazole, decomp. pt. l49-l52C., of the formula were obtained.

EXAMPLE 26 Using a procedure analogous to that described in Example 25, l-[(l'-acryloy1amino-2',2',2'-trichloro)- ethyl]-2-(ethoxycarbonyl-amino)-benzimidazole, decomp. pt. 153-156C., of the formula was prepared from 2-(ethoxy carbonyl-aminobenzimidazole and N-( 1 ,2,2,2-tetrachloro-ethyl)- acrylamide.

EXAMPLE 27 Using a procedure analogous to that described in Example 25, l-[(l-pivaloylamino-2',2',2-trichloro)- ethyl]2-(ethoxycarbonyl-amino)-benzimidazole, decomp. pt. l66l 70C., was prepared from 2-(ethoxycarbonyl-amino)-benzimidazole and N-(l,2,2,2- tetrachloro-ethyl)-trimethylacetamide.

EXAMPLE 28 methyl-benzimidazole. The filtrate was admixed with 4 500 ml of water, and the precipitate formed thereby was collected by vacuum filtration and recrystallized from isopropanol, yielding 5.6 gm of l-[(l'-formylamino-2',2,2-trichloro)-ethyl]-2 -(methoxycarbonyl-amino )-5(6)-methyl-benzimidazole, decomp. pt. 172C, in the form of the solvate with 0.5 mol of isopropanol of crystallization.

The compounds according to the present invention, that is, those embraced by formula I above, have useful properties. More particularly, the compounds of the instant invention exhibit very effective systemic fungicidal activities against a broad variety of phytopathogenic fungi, such as real mildew fungi (Erysiphe graminis and Podosphaera leucotricha), plant rust fungi (Puccinia recondita and Uromyces fabae), blight mildew fungi (Phytophthora infestans and Altemaria iolani), cercospora, botrytis, fusanium, piricularia, verticillium, venturia maequalis and the like.

Since the compounds of the invention are systemic fungicides, they have a prophylactic as well as curative action. In addition, they may also be used an anthelmintics, ovicides and acaricides.

Those compounds of the formula I wherein R is 2,4- dichlorophenoxy-alkyl also exhibit herbicidal activities.

For use as fungicidal agents, the compounds of the present invention are incorporated as active ingredients into conventional agricultural fungicidal compositions, such as wettable powders, emulsion concentrates, solutions, sprays, granulates, dusting powders and the like, i.e., compositions consisting essentially of an inert liquid or solid carrier and an effective fungicidal amount of the active ingredient. By virtue of their good solubilities in organic solvents, the compounds of the present invention are particularly well adapted for the preparation of highly concentrated solutions and emulsion concentrates which are diluted with water to the desired concentration of active ingredient just prior to their use as fungicidal dispersions on plants. The active ingredient concentration range in the agricultural compositions is preferably about 0.05 to 80 percent by weight, based on the total weight, and the concentrated compositions may be diluted to an active ingredient concentration of 0.5 to 0.0001 percent prior to use, although dusting powders and so-called ultra-low-volume compositions (ULV) may also have a higher active ingredient content.

The following examples illustrate a few prophylactic fungicidal compositions comprising a compound of the present invention as an active ingredient and represent the best modes contemplated of putting the invention into practical use. The parts are parts by weight unless otherwise specified.

EXAMPLE 29 Dusting Powder The powder composition was compounded from the following ingredients:

Product of Example 1 5 parts Synthetic silicic acid 5 parts Talcum 90 parts Preparation:

EXAMPLE 30 Spray The spray composition was compounded from the following ingredients:

Product of Example 2 l0 parts Dimethylformamide 50 parts l,2-propyleneglycol 40 parts Condensation product octylphenol and 10 mols of ethyleneglycol (wetting agent) 10 parts Preparation:

The ingredients were intimately admixed with each other, resulting in a liquid concentrate which, when 5 diluted with water into a sprayable aqueous emulsion containing from 0.5 to 0.0001 percent active in- EXAMPLE 31 Aerosol Spray The spray composition was compounded from the following ingredients:

Product of Example 6 0.05 parts Sesame oil 0. l parts N-Methyl-pyrrolidone 1000 parts Mixture of Frigen l l and I2 89.85 parts Preparation:

The benzimidazole compound and the sesame oil were dissolved in the N-methyl-pyrrolidone, the solution was charged into an aerosol container, which was then pressurized with the Frigen propellant gas mixture. The resulting aerosol spray was an effective fungicide when applied to plants.

EXAMPLE 32 Suspension Powder The powder composition was compounded from the following ingredients:

Product of Example 4 80 parts Calcium lignin sulfonate 8 parts Colloidal silicic acid parts Sodium sulfate 5 parts Diisobutyl naphthalene sodium sulfonate 2 pans Preparation:

The ingredients were intimately admixed with each other, and the mixture was milled into a fine powder, which was then suspended in a sufiicient amount of water to make the active ingredient content of the aqueous suspension from 0.5 to 0.001 percent by weight. The resulting sprayable suspension was an effective prophylactic and curative fungicide when applied to plants.

Analogous results were obtained when any one of the other compounds embraced by formula I was substituted for the particular active ingredient in Examples 29 through 32. Likewise, the amount of active ingredient in these illustrative examples may be varied to achieve the concentration range set forth above, and the amounts and nature of the inert carrier ingredients may be varied to meet particularrequirements.

While the present invention has been illustrated with the aid of certain specific embodiments thereof, it will be readily apparent to others skilled in the art that the invention is not limited to these particular embodiments, and that various changes and modifications may be made without departing from the spirit o f the invention or the scope of the appended claims.

' We claim:

1. A compound of the formula wherein R, and R are each hydrogen, chlorine. bromine, alkyl of one to four carbon atoms or alkoxy of one to four carbon atoms,

R, is alkyl of one to three carbon atoms or allyl, and

R is hydrogen, alkyl of one to 17 carbon atoms, alkyl of one to 17 carbon atoms having from one to three halogen substituents or one 2,4- dichlorophenoxy substituent attached thereto, phe'nyl, lower alkenyl or alkoxy of one to 12 carbon atoms.

2. A compound of the formula wherein R and R are each hydrogen, methyl or chlorine, but

other than both chlorine at the same time,

R, is methyl, ethyl or allyl, and

R is hydrogen, alkyl of one to 17 carbon atoms,

chloromethyl, dichlorophenoxy-methyl, phenyl, ethoxy, vinyl or B-propenyl.

3. A compound according to claim 2, which is l-[( l formylamino-2 ,2 ,2 '-trichloro )-ethyl ]-2-( methoxycarbonyl-amino-benzimidazole.

4. A compound according to claim 2, which is l-[( lchloroacetylamino-2',2',2-trichloro)-ethyl]-2- (methoxycarbonyl-amino)-benzimidazole.

5. A compound according to claim 2, which is l-[( l acryloylamino-Z',2,2'-trichloro)-ethyl]-2-( methoxycarbonyl-amino)-benzimidazole.

6. A compound according to claim 2, which is l-[( l acetylamino-2,2,2'-trichloro)-ethyl]-2-( methoxycarbonyl-amino)-benzimidazole.

7. A compound according to claim 2, which is l-[( l propionylamino-Z,2',2-trichloro)-ethyl1-2-(methoxycarbonyl-amino)-benzimidazole.

8. A compound according to claim 2, which is l-[( 1 acetylamino-2,2,2-trichloro-ethyl]-2-(methoxycarbonyl-amino)-5(6)-methyl-benzimidazole.

9. A compound according to claim 2, which is l-[( l acryloylamino-2',2',2-trichloro)-ethyl]-2-(methoxycarbonyl-amino)-( 5 )o-methyl-benzimidazole.

10. A compound according to claim 2, which is l-[( l -stearoylamino-2,2',2-trichloro)-ethyl]-2-( methoxycarbonyl-amino)-benzimidazole.

l 1. A compound according to claim 2, which is l-[(l -octanoylamino-2 ,2 ,2' -trichloro)-ethyl ]-2-( metho xycarbonyl-amino)-benzimidazole.

12. A compound according to claim 2, which is l-[(] ycarbonyl-amino)-benzimidazole.

13. A compound according to claim 2, which is l-[( l '-acryloylamino-2,2',2'-trichloro)-ethyl]-2-( allyloxycarbonyl-amino)-benzimidazole.

14. A compound according to claim 2, which is 1-[( l -acetylamino-2',2,2-trichloro)-ethyl]-2-(allyloxycarbonyl-amino)-benzimidazole.

15. A compound according to claim 2, which is l-[( l 'stearoylamino-2,2,2-trichloro)-ethyl]-2-(allyloxycarbonyl-arnino)-benzimidazole.

16. A compound according to claim 2, which is l-[(l '-benzoylamino-2,2',2-trichloro)-ethyl]-2-(allyloxycarbonyl-amino)-benzimidazole.

17. A compound according to claim 2, which is l-[( l '-octanoylamino-2' ,2 ,2-trichloro)-ethyl ]-2-(ally1oxycarbonyl-amino)-benzimidazole.

18. A compound according to claim 2, which is l-[( l '-ethoxycarbonylamino-2',2,2-trichloro)-]-2-(allyloxycarbonyl-amino)-benzimida2ole.

19. A compound according to claim 2, which is 1-[( 1 "formylamino-2,2,2'-trichloro)-ethyl]-2-(methoxycarbonylamino)-5,o-dimethyl-benzimidazole.

20. A compound according to claim 2, which is 1-[( l '-acetylamino-2' ,2 ,2 -trichloro )-ethyl -2-( methoxycarbonyl-amino)-5,6-dimethyl-benzimidazole.

21. A compound according to claim 2, which is l-[(l -formylamino-2,2,2-trichloro)-ethyl]-2-(methoxycarbonyl-amino)-5(6)-chloro-benzimidazole.

22. A compound according to claim 2, which is l-[( l -acetylamino-2,2',2'-trichloro)-ethyl]-2-(methoxycarbonyl-amino)-(6)6-chloro-benzimidazole.

23. A compound according to claim 2, which is l-[ l -(o,p-dichlorophenoxyacetyl-amino)-2,2,2'- trichloroethyl]-2-( methoxycarbonyl-amino)- benzimidazole.

24. A compound according to claim 2, which is l-[(l '-chloroacetylamino-2 ,2 ,2'-trichloro)-ethyl]-2- (methoxycarbonyl-amino)-5 6)-methylbenzimidazole.

25. A compound according to claim 2, which is l-[( l '-pivaloylamino-2,2,2-trichloro)-ethyl]-2-(methoxycarbonyl-amino )-(-(methoxycarbonyl-amino)-((5 )6- methyl-benzimidazole.

26. A compound according to claim 2, which is 1-[( l -pivaloylamino-2',2,2-trichloro)-ethyl]-2-(methoxycarbonyl-amino)-benzimidazole.

27. A compound according to claim 2, which is l-[( l '-methacryloylamino-2',2,2'-trichloro)-ethyl]-2- (methoxycarbonyl-amino)-benzimidazole.

28. A compound according to claim 2, which is 1-[(l -acryloylamino-2',2',2-trichloro)-ethyl]-2-(ethoxycarbonyl-amino)-benzimidazole.

29. A compound according to claim 2, which is l-[( l -pivaloylamino-2,2,2-trichloro)-ethyl]-2-(ethoxycarbonyl-amino)-benzimidazole.

30. A compound according to claim 2, which is 1-[( 1 '-forymlamino-2',2,2'-trichloro )-ethyl]-2-(methoxycarbonyl-amino)-5(6)-methyl-benzimidazole.

31. A compound according to claim 1, which is l-[( l '-acetylamino-2 ,2 ,2-trichloro )-ethyl -2-( methoxycarbonyl-amino)-5(6)-methoxy-benzimidazole.

32. A compound according to claim 1, which is l-[( l -acetylamino-2,2,2-trichloro)-ethyl]-2-(ethoxycarbonyl-amino)-5(6)-methyl-benzimidazole.

33. A compound according to claim 1, which is l-[( l -acetylamino-2',2,2-trichloro)-ethyl]-2-( mcthoxycarbonyl-amino)-4(7)-methyl-benzimidazole. 

2. A compound of the formula wherein R1 and R2 are each hydrogen, methyl or chlorine, but other than both chlorine at the same time, R3 is methyl, ethyl or allyl, and R4 is hydrogen, alkyl of one to 17 carbon atoms, chloromethyl, dichlorophenoxy-methyl, phenyl, ethoxy, vinyl or Beta -propenyl.
 3. A compound according to claim 2, which is 1-((1''-formylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino -benzimidazole.
 4. A compound according to claim 2, which is 1-((1''-chloroacetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl -amino)-benzimidazole.
 5. A compound according to claim 2, which is 1-((1''-acryloylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -benzimidazole.
 6. A compound according to claim 2, which is 1-((1''-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -benzimidazole.
 7. A compound according to claim 2, which is 1-((1''-propionylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -benzimidazole.
 8. A compound according to claim 2, which is 1-((1''-acetylamino-2'',2'',2''-trichloro-ethyl)-2-(methoxycarbonyl-amino)-5(6) -methyl-benzimidazole.
 9. A compound according to claim 2, which is 1-((1''-acryloylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -(5)6-methyl-benzimidazole.
 10. A compound according to claim 2, which is 1-((1''-stearoylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -benzimidazole.
 11. A compound according to claim 2, which is 1-((1''-octanoylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -benzimidazole.
 12. A compound according to claim 2, which is 1-((1''-formylamino-2'',2'',2''-trichloro)-ethyl)-2-(allyloxycarbonyl-amino) -benzimidazole.
 13. A compound according to claim 2, which is 1-((1''-acryloylamino-2'',2'',2''-trichloro)-ethyl)-2-(allyloxycarbonyl-amino) -benzimidazole.
 14. A compound according to claim 2, which is 1-((1''-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(allyloxycarbonyl-amino) -benzimidazole.
 15. A compound according to claim 2, which is 1-((1''-stearoylamino-2'',2'',2''-trichLoro)-ethyl)-2-(allyloxycarbonyl-amino) -benzimidazole.
 16. A compound according to claim 2, which is 1-((1''-benzoylamino-2'',2'',2''-trichloro)-ethyl)-2-(allyloxycarbonyl-amino) -benzimidazole.
 17. A compound according to claim 2, which is 1-((1''-octanoylamino-2'',2'',2''-trichloro)-ethyl)-2-(allyloxycarbonyl-amino) -benzimidazole.
 18. A compound according to claim 2, which is 1-((1''-ethoxycarbonylamino-2'',2'',2''-trichloro)-)-2-(allyloxycarbonyl-amino) -benzimidazole.
 19. A compound according to claim 2, which is 1-((1''-formylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-5,6 -dimethyl-benzimidazole.
 20. A compound according to claim 2, which is 1-((1''-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-5,6 -dimethyl-benzimidazole.
 21. A compound according to claim 2, which is 1-((1''-formylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-5(6)-chloro-benzimidazole.
 22. A compound according to claim 2, which is 1-((1-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-(6)6 -chloro-benzimidazole.
 23. A compound according to claim 2, which is 1-(1''-(o,p-dichlorophenoxyacetyl-amino)-2'',2'',2''-trichloroethyl)-2 -(methoxycarbonyl-amino)-benzimidazole.
 24. A compound according to claim 2, which is 1-((1''-chloroacetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl -amino)-5(6)-methyl-benzimidazole.
 25. A compound according to claim 2, which is 1-((1''-pivaloylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-( -(methoxycarbonyl-amino)-((5)6-methyl-benzimidazole.
 26. A compound according to claim 2, which is 1-((1''-pivaloylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino) -benzimidazole.
 27. A compound according to claim 2, which is 1-((1''-methacryloylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl -amino)-benzimidazole.
 28. A compound according to claim 2, which is 1-((1''-acryloylamino-2'',2'',2''-trichloro)-ethyl)-2-(ethoxycarbonyl-amino) -benzimidazole.
 29. A compound according to claim 2, which is 1-((1''-pivaloylamino-2'',2'',2''-trichloro)-ethyl)-2-(ethoxycarbonyl-amino) -benzimidazole.
 30. A compound according to claim 2, which is 1-((1''-forymlamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-5(6)-methyl-benzimidazole.
 31. A compound according to claim 1, which is 1-((1''-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-5(6)-methoxy-benzimidazole.
 32. A compound according to claim 1, which is 1-((1''-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(ethoxycarbonyl-amino)-5(6) -methyl-benzimidazole.
 33. A compound according to claim 1, which is 1-((1''-acetylamino-2'',2'',2''-trichloro)-ethyl)-2-(methoxycarbonyl-amino)-4(7)-methyl-benzimidazole. 